Comparison And Analysis Of Testing Methods For Textile Color Fastness

Color fastness (referred to as color fastness) refers to dyeing During the use or processing of fabrics, the degree of fading under the action of external factors (extrusion, friction, water washing, rain, exposure, etc.) is an important indicator of fabric testing. Color fastness includes a wide range of washes, saliva, light resistance, friction resistance, sweat resistance, water resistance, chlorination resistance and complex color fastness. The color fastness depends largely on the chemical structure of the dye. In addition, it depends on the state of the dye on the fiber and the combination of dyes and fibers. In this paper, according to several major color fastness of textiles, the development and research status of color fastness testing standards at home and abroad are analyzed and summarized. The color fastness standards and the corresponding standards abroad are compared and analyzed.

1 color fastness inspection standard system

The first committee of Textile Technology Committee of the international organization for Standardization (ISO/TC 38/SC1) is a committee specializing in textile color fastness test and dyestuff characteristic research. In 1998, it set up an international standard of ISO 105 "textile fastness test", which has thirteen series. It is the most complete and concrete standard series in the world at present, representing the advanced world. Level [1]. Up to now, the commonly used standards are ISO, ASTM, AATCC, JIS, BS, EN, DIN, GB and so on. Among them, the AATCC standard focuses on chemical analysis items and color fastness; ASTM standard focuses on physical indicators such as strength, anti pilling, and so on. For JIS, most standards basically adopt ISO related color fastness test standards in principle and method, but aim at Japan In terms of market conditions and users' actual conditions, the ISO standard has been modified more or less in content; a few other standards have been formulated according to the AATCC method of the United States; others have retained the unique test methods of Japan.

China's first national standard on textiles was put forward by the Ministry of textile industry in 1956. It belongs to only 8 test methods for textile color fastness, especially for pure cotton dyed and dyed fabrics. The standard was revised in 1978 and extended to cotton pure spinning products and cotton and chemical fiber blended products. After half a century of development, China's color fastness inspection standards have developed rapidly. There are 55 color fastness methods in the current standard [2]. Except for the two test methods of "saliva color fastness" and "fastness to light color: carbon arc", the remaining 53 standards refer to the ISO standard.

From a large number of documents, we can see that the color fastness test methods and standards abroad are more advanced and advanced than domestic standards. The domestic standards refer to ISO to a large extent, but the time for making them is usually several years late.

2 research status and shortcomings of different color fastness projects

Color fastness includes a wide range of contents and many items of testing. The following are the comparison of the main color fastness standards in China, the test results and the foreign test standards, and the differences are analyzed.

2.1 colour fastness to washing

Color fastness assessment is the ability to maintain the color of textiles after washing. It is an important index to measure the use value of textiles. The current standards of textile color fastness to washing in China mainly include GB/T 3921-2008 "color fastness to textiles and color fastness to soaping" and GB/T 12490-2007 "textile color fastness to household and commercial washing fastness". apply The scope, the rating tool and the choice of detergents are different. [3], the following table shows: